{"id":3533,"date":"2021-05-12T15:33:13","date_gmt":"2021-05-12T13:33:13","guid":{"rendered":"http:\/\/hybster.com\/?post_type=documentation&p=3533"},"modified":"2026-04-07T17:27:40","modified_gmt":"2026-04-07T15:27:40","slug":"plastic-part-design-guideline-screw-bosses","status":"publish","type":"documentation","link":"https:\/\/hybster.com\/en\/documentation\/plastic-part-design-guideline-screw-bosses\/","title":{"rendered":"Design rules for plastic parts - Screwing"},"content":{"rendered":"
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Joining plastic parts by screwing is a very common operation. However, there are a few design rules that must be followed to ensure a reliable assembly over time.
The thermoplastic materials<\/a> require suitable screws. For several years, suppliers such as Ejot<\/a>, screwerk<\/a> or schriever<\/a> offer special profile screws for standard and technical plastics with or without glass or carbon fibres.
Below are the design rules for plastic parts<\/strong> :<\/p>\r\n<\/blockquote>\r\n\r\n\r\n\r\n

The advantages are numerous.<\/strong><\/p>\r\n\r\n\r\n\r\n

    \r\n
  1. Optimal screwing of the plastic material<\/li>\r\n\r\n\r\n\r\n
  2. Minimum radial voltages<\/li>\r\n\r\n\r\n\r\n
  3. Long screw life under static and dynamic loads<\/li>\r\n\r\n\r\n\r\n
  4. Low notching moments<\/li>\r\n\r\n\r\n\r\n
  5. No risk of relaxation<\/li>\r\n\r\n\r\n\r\n
  6. 10 times guaranteed screwing<\/li>\r\n\r\n\r\n\r\n
  7. The unique screwing geometry<\/li>\r\n\r\n\r\n\r\n
  8. The thread geometry is the result of an optimal connection and self-loosening in the plastic.<\/li>\r\n\r\n\r\n\r\n
  9. High loading force due to wide flank coverage on the load-bearing side<\/li>\r\n<\/ol>\r\n\r\n\r\n\r\n

    We also propose you, below, a tool for dimensioning the screwing barrels.
    This design rule for screw assembly in plastic parts is a guide to be adapted to the supply used.<\/p>\r\n\r\n\r\n

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